1 files changed, 44 insertions, 2 deletions
diff --git a/actionpack/test/controller/parameters/parameters_permit_test.rb b/actionpack/test/controller/parameters/parameters_permit_test.rb
index 87816515e7..896bda2597 100644
--- a/actionpack/test/controller/parameters/parameters_permit_test.rb
+++ b/actionpack/test/controller/parameters/parameters_permit_test.rb
@@ -294,7 +294,49 @@ class ParametersPermitTest < ActiveSupport::TestCase
   end
 
   test "to_unsafe_h returns unfiltered params" do
-    assert @params.to_h.is_a? ActiveSupport::HashWithIndifferentAccess
-    assert_not @params.to_h.is_a? ActionController::Parameters
+    assert @params.to_unsafe_h.is_a? ActiveSupport::HashWithIndifferentAccess
+    assert_not @params.to_unsafe_h.is_a? ActionController::Parameters
+  end
+
+  test "to_unsafe_h returns unfiltered params even after accessing few keys" do
+    params = ActionController::Parameters.new("f"=>{"language_facet"=>["Tibetan"]})
+    expected = {"f"=>{"language_facet"=>["Tibetan"]}}
+
+    assert params['f'].is_a? ActionController::Parameters
+    assert_equal expected, params.to_unsafe_h
+  end
+
+  test "to_h only deep dups Ruby collections" do
+    company = Class.new do
+      attr_reader :dupped
+      def dup; @dupped = true; end
+    end.new
+
+    params = ActionController::Parameters.new(prem: { likes: %i( dancing ) })
+    assert_equal({ 'prem' => { 'likes' => %i( dancing ) } }, params.permit!.to_h)
+
+    params = ActionController::Parameters.new(companies: [ company, :acme ])
+    assert_equal({ 'companies' => [ company, :acme ] }, params.permit!.to_h)
+    assert_not company.dupped
+  end
+
+  test "to_unsafe_h only deep dups Ruby collections" do
+    company = Class.new do
+      attr_reader :dupped
+      def dup; @dupped = true; end
+    end.new
+
+    params = ActionController::Parameters.new(prem: { likes: %i( dancing ) })
+    assert_equal({ 'prem' => { 'likes' => %i( dancing ) } }, params.to_unsafe_h)
+
+    params = ActionController::Parameters.new(companies: [ company, :acme ])
+    assert_equal({ 'companies' => [ company, :acme ] }, params.to_unsafe_h)
+    assert_not company.dupped
+  end
+
+  test "included? returns true when the key is present" do
+    assert @params.include? :person
+    assert @params.include? 'person'
+    assert_not @params.include? :gorilla
   end
 end